diff --git a/cmd/tools/gen_vc.v b/cmd/tools/gen_vc.v
index b89d8c973f..7d83cd84aa 100644
--- a/cmd/tools/gen_vc.v
+++ b/cmd/tools/gen_vc.v
@@ -117,7 +117,7 @@ fn main() {
  	fp.description(app_description)
  	fp.skip_executable()
 
-	show_help:=fp.bool('help', false, 'Show this help screen\n')
+	show_help:=fp.bool('help', 0, false, 'Show this help screen\n')
 	flag_options := parse_flags(mut fp)
 
 	if( show_help ){ println( fp.usage() ) exit(0) }
@@ -181,14 +181,14 @@ pub fn (ws &WebhookServer) reset() {
 // parse flags to FlagOptions struct
 fn parse_flags(fp mut flag.FlagParser) FlagOptions {
 	return FlagOptions{
-		serve    : fp.bool('serve', false, 'run in webhook server mode')
-		work_dir : fp.string('work-dir', work_dir, 'gen_vc working directory')
-		purge    : fp.bool('purge', false, 'force purge the local repositories')
-		port     : fp.int('port', server_port, 'port for web server to listen on')
-		log_to   : fp.string('log-to', log_to, 'log to is \'file\' or \'terminal\'')
-		log_file : fp.string('log-file', log_file, 'log file to use when log-to is \'file\'')
-		dry_run  : fp.bool('dry-run', dry_run, 'when specified dont push anything to remote repo')
-		force    : fp.bool('force', false, 'force update even if already up to date')
+		serve    : fp.bool('serve', 0, false, 'run in webhook server mode')
+		work_dir : fp.string('work-dir', 0, work_dir, 'gen_vc working directory')
+		purge    : fp.bool('purge', 0, false, 'force purge the local repositories')
+		port     : fp.int('port', 0, server_port, 'port for web server to listen on')
+		log_to   : fp.string('log-to', 0, log_to, 'log to is \'file\' or \'terminal\'')
+		log_file : fp.string('log-file', 0, log_file, 'log file to use when log-to is \'file\'')
+		dry_run  : fp.bool('dry-run', 0, dry_run, 'when specified dont push anything to remote repo')
+		force    : fp.bool('force', 0, false, 'force update even if already up to date')
 	}
 }
 
diff --git a/cmd/tools/modules/vgit/vgit.v b/cmd/tools/modules/vgit/vgit.v
index 33a37136ac..73bfa321dd 100644
--- a/cmd/tools/modules/vgit/vgit.v
+++ b/cmd/tools/modules/vgit/vgit.v
@@ -137,16 +137,16 @@ pub fn (vgit_context mut VGitContext) compile_oldv_if_needed() {
 
 pub fn add_common_tool_options<T>(context mut T, fp mut flag.FlagParser) []string {
 	tdir := os.temp_dir()
-	context.workdir = os.realpath(fp.string_('workdir', `w`, tdir, 'A writable base folder. Default: $tdir'))
-	context.v_repo_url = fp.string('vrepo', vgit.remote_v_repo_url, 'The url of the V repository. You can clone it locally too. See also --vcrepo below.')
-	context.vc_repo_url = fp.string('vcrepo', vgit.remote_vc_repo_url, 'The url of the vc repository. You can clone it
+	context.workdir = os.realpath(fp.string('workdir', `w`, tdir, 'A writable base folder. Default: $tdir'))
+	context.v_repo_url = fp.string('vrepo', 0, vgit.remote_v_repo_url, 'The url of the V repository. You can clone it locally too. See also --vcrepo below.')
+	context.vc_repo_url = fp.string('vcrepo', 0, vgit.remote_vc_repo_url, 'The url of the vc repository. You can clone it
 ${flag.SPACE}beforehand, and then just give the local folder
 ${flag.SPACE}path here. That will eliminate the network ops
 ${flag.SPACE}done by this tool, which is useful, if you want
 ${flag.SPACE}to script it/run it in a restrictive vps/docker.
 ')
-	context.show_help = fp.bool_('help', `h`, false, 'Show this help screen.')
-	context.verbose = fp.bool_('verbose', `v`, false, 'Be more verbose.')
+	context.show_help = fp.bool('help', `h`, false, 'Show this help screen.')
+	context.verbose = fp.bool('verbose', `v`, false, 'Be more verbose.')
 
 	if (context.show_help) {
 		println(fp.usage())
diff --git a/cmd/tools/oldv.v b/cmd/tools/oldv.v
index 94e150f4de..24beca3fd5 100644
--- a/cmd/tools/oldv.v
+++ b/cmd/tools/oldv.v
@@ -76,8 +76,8 @@ fn main() {
 	fp.skip_executable()
 	fp.limit_free_args(1, 1)
 
-	context.cleanup = fp.bool('clean', true, 'Clean before running (slower).')
-	context.cmd_to_run = fp.string_('command', `c`, '', 'Command to run in the old V repo.\n')
+	context.cleanup = fp.bool('clean', 0, true, 'Clean before running (slower).')
+	context.cmd_to_run = fp.string('command', `c`, '', 'Command to run in the old V repo.\n')
 
 	commits := vgit.add_common_tool_options(mut context, mut fp)
 	if commits.len > 0 {
diff --git a/cmd/tools/performance_compare.v b/cmd/tools/performance_compare.v
index 0462e21c8f..6357a12ff3 100644
--- a/cmd/tools/performance_compare.v
+++ b/cmd/tools/performance_compare.v
@@ -187,8 +187,8 @@ fn main() {
 	fp.skip_executable()
 	fp.limit_free_args(1, 2)
 
-	context.vflags = fp.string('vflags', '', 'Additional options to pass to the v commands, for example "-cc tcc"')
-	context.hyperfineopts = fp.string('hyperfine_options', '',
+	context.vflags = fp.string('vflags', 0, '', 'Additional options to pass to the v commands, for example "-cc tcc"')
+	context.hyperfineopts = fp.string('hyperfine_options', 0, '',
 		'Additional options passed to hyperfine.
 ${flag.SPACE}For example on linux, you may want to pass:
 ${flag.SPACE}--hyperfine_options "--prepare \'sync; echo 3 | sudo tee /proc/sys/vm/drop_caches\'"
diff --git a/cmd/tools/vbin2v.v b/cmd/tools/vbin2v.v
index ce186befd8..38f9db5b85 100644
--- a/cmd/tools/vbin2v.v
+++ b/cmd/tools/vbin2v.v
@@ -69,9 +69,9 @@ fn main() {
 	fp.version(tool_version)
 	fp.description(tool_description)
 	fp.arguments_description('FILE [FILE]...')
-	context.show_help = fp.bool_('help', `h`, false, 'Show this help screen.')
-	context.module_name = fp.string_('module', `m`, 'binary', 'Name of the generated module.\n')
-	context.prefix = fp.string_('prefix', `p`, '', 'A prefix put before each resource name.\n')
+	context.show_help = fp.bool('help', `h`, false, 'Show this help screen.')
+	context.module_name = fp.string('module', `m`, 'binary', 'Name of the generated module.\n')
+	context.prefix = fp.string('prefix', `p`, '', 'A prefix put before each resource name.\n')
 	if (context.show_help) {
 		println(fp.usage())
 		exit(0)
diff --git a/cmd/tools/vnames.v b/cmd/tools/vnames.v
index a66849f033..a476e86640 100644
--- a/cmd/tools/vnames.v
+++ b/cmd/tools/vnames.v
@@ -64,7 +64,7 @@ fn main(){
 	fp.arguments_description('FILE.v/FOLDER [FILE.v/FOLDER]...')
 	fp.limit_free_args_to_at_least(1)
 	fp.skip_executable()
-	show_help:=fp.bool_('help', `h`, false, 'Show this help screen\n')
+	show_help:=fp.bool('help', `h`, false, 'Show this help screen\n')
 	if( show_help ){
 		println( fp.usage() )
 		exit(0)
diff --git a/vlib/flag/flag.v b/vlib/flag/flag.v
index a781adc4f4..cd9f3e5c61 100644
--- a/vlib/flag/flag.v
+++ b/vlib/flag/flag.v
@@ -245,23 +245,13 @@ pub fn (fs mut FlagParser) bool_opt(name string, abbr byte, usage string) ?bool
 //      the default value is returned
 // version with abbr
 //TODO error handling for invalid string to bool conversion
-pub fn (fs mut FlagParser) bool_(name string, abbr byte, bdefault bool, usage string) bool {
+pub fn (fs mut FlagParser) bool(name string, abbr byte, bdefault bool, usage string) bool {
 	value := fs.bool_opt(name, abbr, usage) or {
 		return bdefault
 	}
 	return value
 }
 
-// defining and parsing a bool flag
-//  if defined
-//      the value is returned (true/false)
-//  else
-//      the default value is returned
-//TODO error handling for invalid string to bool conversion
-pub fn (fs mut FlagParser) bool(name string, v bool, usage string) bool {
-	return fs.bool_(name, 0, v, usage)
-}
-
 // int_multi returns all instances of values associated with the flags provided
 // In the case that none were found, it returns an empty array.
 pub fn (fs mut FlagParser) int_multi(name string, abbr byte, usage string) []int {
@@ -292,23 +282,13 @@ pub fn (fs mut FlagParser) int_opt(name string, abbr byte, usage string) ?int {
 //      the default value is returned
 // version with abbr
 //TODO error handling for invalid string to int conversion
-pub fn (fs mut FlagParser) int_(name string, abbr byte, idefault int, usage string) int {
+pub fn (fs mut FlagParser) int(name string, abbr byte, idefault int, usage string) int {
 	value := fs.int_opt(name, abbr, usage) or {
 		return idefault
 	}
 	return value
 }
 
-// defining and parsing an int flag
-//  if defined
-//      the value is returned (int)
-//  else
-//      the default value is returned
-//TODO error handling for invalid string to int conversion
-pub fn (fs mut FlagParser) int(name string, i int, usage string) int {
-	return fs.int_(name, 0, i, usage)
-}
-
 // float_multi returns all instances of values associated with the flags provided
 // In the case that none were found, it returns an empty array.
 pub fn (fs mut FlagParser) float_multi(name string, abbr byte, usage string) []f32 {
@@ -339,23 +319,13 @@ pub fn (fs mut FlagParser) float_opt(name string, abbr byte, usage string) ?f32
 //      the default value is returned
 // version with abbr
 //TODO error handling for invalid string to float conversion
-pub fn (fs mut FlagParser) float_(name string, abbr byte, fdefault f32, usage string) f32 {
+pub fn (fs mut FlagParser) float(name string, abbr byte, fdefault f32, usage string) f32 {
 	value := fs.float_opt(name, abbr, usage) or {
 		return fdefault
 	}
 	return value
 }
 
-// defining and parsing a float flag
-//  if defined
-//      the value is returned (float)
-//  else
-//      the default value is returned
-//TODO error handling for invalid string to float conversion
-pub fn (fs mut FlagParser) float(name string, f f32, usage string) f32 {
-	return fs.float_(name, 0, f, usage)
-}
-
 // string_multi returns all instances of values associated with the flags provided
 // In the case that none were found, it returns an empty array.
 pub fn (fs mut FlagParser) string_multi(name string, abbr byte, usage string) []string {
@@ -380,22 +350,13 @@ pub fn (fs mut FlagParser) string_opt(name string, abbr byte, usage string) ?str
 //  else
 //      the default value is returned
 // version with abbr
-pub fn (fs mut FlagParser) string_(name string, abbr byte, sdefault string, usage string) string {
+pub fn (fs mut FlagParser) string(name string, abbr byte, sdefault string, usage string) string {
 	value := fs.string_opt(name, abbr, usage) or {
 		return sdefault
 	}
 	return value
 }
 
-// defining and parsing a string flag
-//  if defined
-//      the value is returned (string)
-//  else
-//      the default value is returned
-pub fn (fs mut FlagParser) string(name string, sdefault string, usage string) string {
-	return fs.string_(name, 0, sdefault, usage)
-}
-
 pub fn (fs mut FlagParser) limit_free_args_to_at_least(n int) {
 	if n > MAX_ARGS_NUMBER {
 		panic('flag.limit_free_args_to_at_least expect n to be smaller than $MAX_ARGS_NUMBER')
@@ -522,4 +483,3 @@ pub fn (fs FlagParser) finalize() ?[]string {
 	}
 	return fs.args
 }
-
diff --git a/vlib/flag/flag_test.v b/vlib/flag/flag_test.v
index 6c20198934..5851434779 100644
--- a/vlib/flag/flag_test.v
+++ b/vlib/flag/flag_test.v
@@ -3,10 +3,10 @@ import flag
 fn test_if_flag_not_given_return_default_values() {
 	mut fp := flag.new_flag_parser([])
 
-	assert false == fp.bool('a_bool', false, '')
-	&& 42 == fp.int('an_int', 42, '')
-	&& 1.0 == fp.float('a_float', 1.0, '')
-	&& 'stuff' == fp.string('a_string', 'stuff', '')
+	assert false == fp.bool('a_bool', 0, false, '')
+	&& 42 == fp.int('an_int', 0, 42, '')
+	&& 1.0 == fp.float('a_float', 0, 1.0, '')
+	&& 'stuff' == fp.string('a_string', 0, 'stuff', '')
 }
 
 
@@ -24,7 +24,7 @@ fn test_could_define_application_name_and_version() {
 fn test_bool_flags_do_not_need_an_value() {
 	mut fp := flag.new_flag_parser(['--a_bool'])
 
-	assert true == fp.bool('a_bool', false, '')
+	assert true == fp.bool('a_bool', 0, false, '')
 }
 
 fn test_flags_could_be_defined_with_eq() {
@@ -35,11 +35,11 @@ fn test_flags_could_be_defined_with_eq() {
 	'--a_string=stuff',
 	'--a_bool=true'])
 
-	assert 42 == fp.int('an_int', 666, '')
-	&& true == fp.bool('a_bool', false, '')
-	&& true == fp.bool('bool_without', false, '')
-	&& 2.0 == fp.float('a_float', 1.0, '')
-	&& 'stuff' == fp.string('a_string', 'not_stuff', '')
+	assert 42 == fp.int('an_int', 0, 666, '')
+	&& true == fp.bool('a_bool', 0, false, '')
+	&& true == fp.bool('bool_without', 0, false, '')
+	&& 2.0 == fp.float('a_float', 0, 1.0, '')
+	&& 'stuff' == fp.string('a_string', 0, 'not_stuff', '')
 }
 
 fn test_values_could_be_defined_without_eq() {
@@ -50,11 +50,11 @@ fn test_values_could_be_defined_without_eq() {
 	'--a_string', 'stuff',
 	'--a_bool', 'true'])
 
-	assert 42 == fp.int('an_int', 666, '')
-	&& true == fp.bool('a_bool', false, '')
-	&& true == fp.bool('bool_without', false, '')
-	&& 2.0 == fp.float('a_float', 1.0, '')
-	&& 'stuff' == fp.string('a_string', 'not_stuff', '')
+	assert 42 == fp.int('an_int', 0, 666, '')
+	&& true == fp.bool('a_bool', 0, false, '')
+	&& true == fp.bool('bool_without', 0, false, '')
+	&& 2.0 == fp.float('a_float', 0, 1.0, '')
+	&& 'stuff' == fp.string('a_string', 0, 'not_stuff', '')
 }
 
 fn test_values_could_be_defined_mixed() {
@@ -65,11 +65,11 @@ fn test_values_could_be_defined_mixed() {
 	'--a_string', 'stuff',
 	'--a_bool=true'])
 
-	assert 42 == fp.int('an_int', 666, '')
-	&& true == fp.bool('a_bool', false, '')
-	&& true == fp.bool('bool_without', false, '')
-	&& 2.0 == fp.float('a_float', 1.0, '')
-	&& 'stuff' == fp.string('a_string', 'not_stuff', '')
+	assert 42 == fp.int('an_int', 0, 666, '')
+	&& true == fp.bool('a_bool', 0, false, '')
+	&& true == fp.bool('bool_without', 0, false, '')
+	&& 2.0 == fp.float('a_float', 0, 1.0, '')
+	&& 'stuff' == fp.string('a_string', 0, 'not_stuff', '')
 }
 
 fn test_beaware_for_argument_names_with_same_prefix() {
@@ -78,8 +78,8 @@ fn test_beaware_for_argument_names_with_same_prefix() {
 	'--shorter=7'
 	])
 
-	assert 5 == fp.int('short', 666, '')
-	&& 7 == fp.int('shorter', 666, '')
+	assert 5 == fp.int('short', 0, 666, '')
+	&& 7 == fp.int('shorter', 0, 666, '')
 }
 
 fn test_beaware_for_argument_names_with_same_prefix_inverse() {
@@ -88,8 +88,8 @@ fn test_beaware_for_argument_names_with_same_prefix_inverse() {
 	'--short', '5',
 	])
 
-	assert 5 == fp.int('short', 666, '')
-	&& 7 == fp.int('shorter', 666, '')
+	assert 5 == fp.int('short', 0, 666, '')
+	&& 7 == fp.int('shorter', 0, 666, '')
 }
 
 fn test_allow_to_skip_executable_path() {
@@ -108,14 +108,14 @@ fn test_none_flag_arguments_are_allowed() {
 	mut fp := flag.new_flag_parser([
 	'file1', '--an_int=2', 'file2', 'file3', '--bool_without', 'file4', '--outfile', 'outfile'])
 
-	assert 2 == fp.int('an_int', 666, '')
-	&& 'outfile' == fp.string('outfile', 'bad', '')
-	&& true == fp.bool('bool_without', false, '')
+	assert 2 == fp.int('an_int', 0, 666, '')
+	&& 'outfile' == fp.string('outfile', 0, 'bad', '')
+	&& true == fp.bool('bool_without', 0, false, '')
 }
 
 fn test_finalize_returns_none_flag_arguments_ordered() {
 	mut fp := flag.new_flag_parser(['d', 'b', 'x', 'a', '--outfile', 'outfile'])
-	fp.string('outfile', 'bad', '')
+	fp.string('outfile', 0, 'bad', '')
 
 	finalized := fp.finalize() or {
 		assert false
@@ -133,7 +133,7 @@ fn test_finalize_returns_none_flag_arguments_ordered() {
 fn test_finalize_returns_error_for_unknown_flags() {
 	mut fp := flag.new_flag_parser(['--known', '--unknown'])
 
-	fp.bool('known', false, '')
+	fp.bool('known', 0, false, '')
 
 	finalized := fp.finalize() or {
 		assert err == 'Unknown argument \'unknown\''
@@ -149,11 +149,11 @@ fn test_allow_to_build_usage_message() {
 	fp.version('v0.0.0')
 	fp.description('some short information about this tool')
 
-	fp.int('an_int', 666, 'some int to define')
-	fp.bool('a_bool', false, 'some bool to define')
-	fp.bool('bool_without_but_really_big', false, 'this should appear on the next line')
-	fp.float('a_float', 1.0, 'some float as well')
-	fp.string('a_string', 'not_stuff', 'your credit card number')
+	fp.int('an_int', 0, 666, 'some int to define')
+	fp.bool('a_bool', 0, false, 'some bool to define')
+	fp.bool('bool_without_but_really_big', 0, false, 'this should appear on the next line')
+	fp.float('a_float', 0, 1.0, 'some float as well')
+	fp.string('a_string', 0, 'not_stuff', 'your credit card number')
 
 	usage := fp.usage()
 	mut all_strings_found := true
@@ -180,7 +180,7 @@ fn test_if_no_description_given_usage_message_does_not_contain_descpription() {
 	fp.application('flag_tool')
 	fp.version('v0.0.0')
 
-	fp.bool('a_bool', false, '')
+	fp.bool('a_bool', 0, false, '')
 
 	assert !fp.usage().contains('Description:')
 }
@@ -236,10 +236,10 @@ fn test_could_expect_no_free_args() {
 fn test_allow_abreviations() {
 	mut fp := flag.new_flag_parser(['-v', '-o', 'some_file', '-i', '42', '-f', '2.0'])
 
-	v := fp.bool_('version', `v`, false, '')
-	o := fp.string_('output', `o`, 'empty', '')
-	i := fp.int_('count', `i`, 0, '')
-	f := fp.float_('value', `f`, 0.0, '')
+	v := fp.bool('version', `v`, false, '')
+	o := fp.string('output', `o`, 'empty', '')
+	i := fp.int('count', `i`, 0, '')
+	f := fp.float('value', `f`, 0.0, '')
 
 	assert v && o == 'some_file' && i == 42 && f == 2.0
 
@@ -256,8 +256,8 @@ fn test_allow_kebab_options() {
 
 	mut fp := flag.new_flag_parser(['--my-long-flag', 'true', '--my-long-option', long_option_value ])
 
-	my_flag   := fp.bool('my-long-flag',     false,         'flag with long-kebab-name')
-	my_option := fp.string('my-long-option', default_value, 'string with long-kebab-name')
+	my_flag := fp.bool('my-long-flag', 0, false, 'flag with long-kebab-name')
+	my_option := fp.string('my-long-option', 0, default_value, 'string with long-kebab-name')
 
 	assert my_flag == true
 	assert my_option == long_option_value
@@ -324,9 +324,9 @@ fn test_multiple_arguments() {
 fn test_long_options_that_start_with_the_same_letter_as_another_short_option() {
 	mut fp := flag.new_flag_parser([
 		'--vabc', '/abc',
-	])	
-	verbose := fp.bool_('verbose', `v`, false, 'Be more verbose.')
-	vabc    := fp.string_('vabc', `x`, 'default', 'Another option that *may* conflict with v, but *should not*')
+	])
+	verbose := fp.bool('verbose', `v`, false, 'Be more verbose.')
+	vabc    := fp.string('vabc', `x`, 'default', 'Another option that *may* conflict with v, but *should not*')
 	assert verbose == false
 	assert vabc == '/abc'
 }
@@ -335,9 +335,9 @@ fn test_long_options_that_start_with_the_same_letter_as_another_short_option_bot
 	mut fp := flag.new_flag_parser([
 		'-v',
 		'--vabc', '/abc',
-	])	
-	verbose := fp.bool_('verbose', `v`, false, 'Be more verbose.')
-	vabc    := fp.string_('vabc', `x`, 'default', 'Another option that *may* conflict with v, but *should not*')
+	])
+	verbose := fp.bool('verbose', `v`, false, 'Be more verbose.')
+	vabc    := fp.string('vabc', `x`, 'default', 'Another option that *may* conflict with v, but *should not*')
 	assert verbose == true
 	assert vabc == '/abc'
 }